/**
 * 用于将地址后面的参数转换成对象返回
 * @param {string} url
 * @returns {Object}
 */
export function param2Obj(url) {
  const search = url.split('?')[1]
  if (!search) {
    return {}
  }
  return JSON.parse(
    '{"' +
    decodeURIComponent(search)
      .replace(/"/g, '\\"')
      .replace(/&/g, '","')
      .replace(/=/g, '":"')
      .replace(/\+/g, ' ') +
    '"}'
  )
}

/**
 * 函数防抖
 * @param {Function} func
 * @param {number} delay
 * @param {boolean} immediate
 * @return {*}
 */
export function debounce(func, delay, immediate = false) {
  let timer, context = this
  return (...args) => {
    if (immediate) {
      func.apply(context, args)
      immediate = false
      return
    }
    clearTimeout(timer)
    timer = setTimeout(() => {
      func.apply(context, args)
    }, delay)
  }
}

/**
 * 转换JSON  导出
 * @param  {Array}
 * @return {Array}
 */
export function formatJson(arr, filterVal) {
  return arr.map(v => filterVal.map(j => v[j].toString()))
}

// 回显数据字典
export function selectDictLabel(datas, value) {
  var actions = []
  Object.keys(datas).some(key => {
    if (datas[key].dictValue == ('' + value)) {
      actions.push(datas[key].dictLabel)
      return true
    }
  })
  return actions.join('')
}

// 回显数据字典（字符串数组）
export function selectDictLabels(datas, value, separator) {
  var actions = []
  var currentSeparator = undefined === separator ? ',' : separator
  var temp = value.split(currentSeparator)
  Object.keys(value.split(currentSeparator)).some(val => {
    Object.keys(datas).some(key => {
      if (datas[key].dictValue == ('' + temp[val])) {
        actions.push(datas[key].dictLabel + currentSeparator)
      }
    })
  })
  return actions.join('').substring(0, actions.join('').length - 1)
}

// 通用下载方法
export function download(fileName) {
  window.location.href = process.env.VUE_APP_API_ROOT + 'common/download?fileName=' + encodeURI(fileName) + '&delete=' + true
}

// 日期格式化
export function parseTime(time, pattern) {
  if (arguments.length === 0 || !time) {
    return null
  }
  const format = pattern || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'object') {
    date = time
  } else {
    if ((typeof time === 'string') && (/^[0-9]+$/.test(time))) {
      time = parseInt(time)
    } else if (typeof time === 'string') {
      time = time.replace(new RegExp(/-/gm), '/')
    }
    if ((typeof time === 'number') && (time.toString().length === 10)) {
      time = time * 1000
    }
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
    let value = formatObj[key]
    // Note: getDay() returns 0 on Sunday
    if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value] }
    if (result.length > 0 && value < 10) {
      value = '0' + value
    }
    return value || 0
  })
  return time_str
}

// 添加日期范围
export function addDateRange(params, dateRange, propName) {
  var search = params
  search.params = {}
  if (null != dateRange && '' != dateRange) {
    if (typeof (propName) === 'undefined') {
      search.params['beginTime'] = dateRange[0]
      search.params['endTime'] = dateRange[1]
    } else {
      search.params['begin' + propName] = dateRange[0]
      search.params['end' + propName] = dateRange[1]
    }
  }
  return search
}

// 转换字符串，undefined,null等转化为''
export function praseStrEmpty(str) {
  if (!str || str == 'undefined' || str == 'null') {
    return ''
  }
  return str
}

/**
 * 表单重置
 * @param {*} refName 要重置的表单ref名称
 */
export function resetForm(refName) {
  if (this.$refs[refName]) {
    this.$refs[refName].resetFields()
  }
}

/**
 * 构造树型结构数据
 * @param {*} data 数据源
 * @param {*} id id字段 默认 'id'
 * @param {*} parentId 父节点字段 默认 'parentId'
 * @param {*} children 孩子节点字段 默认 'children'
 */
export function handleTree(data, id, parentId, children) {
  let config = {
    id: id || 'id',
    parentId: parentId || 'parentId',
    childrenList: children || 'children'
  }
  var childrenListMap = {}
  var nodeIds = {}
  var tree = []
  for (let d of data) {
    let parentId = d[config.parentId]
    if (childrenListMap[parentId] == null) {
      childrenListMap[parentId] = []
    }
    nodeIds[d[config.id]] = d
    childrenListMap[parentId].push(d)
  }
  for (let d of data) {
    let parentId = d[config.parentId]
    if (nodeIds[parentId] == null) {
      tree.push(d)
    }
  }
  for (let t of tree) {
    adaptToChildrenList(t)
  }
  function adaptToChildrenList(o) {
    if (childrenListMap[o[config.id]] !== null) {
      o[config.childrenList] = childrenListMap[o[config.id]]
    }
    if (o[config.childrenList]) {
      for (let c of o[config.childrenList]) {
        adaptToChildrenList(c)
      }
    }
  }
  return tree
}
